K L Baluja
Articles written in Pramana – Journal of Physics
Volume 43 Issue 6 December 1994 pp 477-485
Systematic trends in the line strengths of E1 transitions in the oxygen isoelectronic sequence
Line strengths
Volume 45 Issue 6 December 1995 pp 533-536 Research Articles
Relativistic correction to the dipole polarizability of a hydrogenic ion
The first relativistic correction of order
Volume 45 Issue 6 December 1995 pp 537-543 Research Articles
Line strength
Volume 46 Issue 6 June 1996 pp 431-449
Positron scattering from hydrocarbons
The total cross sections for positron impact on hydrocarbons have been calculated using the additivity rule in which the total cross section for a molecule is the sum of the total cross section for the constituent atoms. The energy range considered is from a few eV to several thousand eV. The total cross sections for positron impact on an atom are calculated by employing a complex spherical potential which comprises of a static, polarization and an absorption potential. We have good agreement with the experimental results for hydrocarbons for positron energy ⩾100 eV. Our results also agree with the available calculations for CH_{4} and C_{2}H_{2} which employed full molecular wavefunctions beyond 100 eV. Our absorption cross sections also agree with molecular wave-function calculations for C_{2}H_{2} and CH_{4} beyond 100 eV. We have shown the Bethe plots for
Volume 47 Issue 1 July 1996 pp 87-98 Research Articles
Positron scattering from alkaline-earth elements
The total (elastic + inelastic) cross sections for
Volume 54 Issue 3 March 2000 pp 377-384 Research Articles
Transition amplitudes and transition probabilities for the two-photon 1
Volume 88 Issue 5 May 2017 Article ID 0076 Research Article
Rate coefficients of open shell molecules and radicals: $R$-matrix method
JASMEET SINGH K L BALUJA GAGANDEEP LONGIANY
The open shell molecules with even number of electrons have $\pi^2$ or $\pi^{2}_{g}$ ground-state electronic configuration. Several homonuclear diatomic molecules like $\rm{O_2, S_2, B_2}$ have $\pi^{2}_{g}$ ground state in the $D_{\infty h}$ point group and heteronuclear diatomic radicals like PH, NH, SO have $\pi^2$ ground state in the $C_{\infty v}$ point group. We have computed and presented here the rate coefficient of these open shell molecules $\rm{(O_2, S_2, B_2)}$ and radicals (PH, NH,SO) from the results of our previous studies using a well-established $\it {ab-initio}$ formalism: the $R$-matrix method. The rate coefficients for elastic and electron-excited processes are studied over a wide electron temperature range.
Volume 89 Issue 2 August 2017 Article ID 0030 Research Article
Low-energy electron impact cross-sections and rate constants of $NH_2$
ANAND BHARADVAJA SAVINDER KAUR K L BALUJA
This systematic study reports various electron impact cross-sections, rate constants and transport properties of $NH_2$ radical in the low-energy limit. The collision study is based on $R$-matrix formalism and involves the use of various scattering models employing different active spaces. Both electron excited inelasticcross-sections and resonances are found influenced by correlation and polarization effects. The non-relativistic molecular bremsstrahlung radiation cross-section for soft photons, binary encounter Bethe model-based ionization cross-sections and a few molecular properties of the target radical are also reported. The present calculations are found to be in agreement with the available results. This theoretical study provides a pathway to understand collision dynamics and generates data required in various fields of applied physics.
Volume 94, 2020
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